ASTROSAT CZTI

Data Quality Report

Orbit 20190228_A05_075T08_9000002744_level2

Creation date: 2025-11-28T01:54:16.660959
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A05_075T08_9000002744cztM0_level2.fits modeM0/AS1A05_075T08_9000002744cztM0_level2_quad_clean.evt
Size (bytes)487,411,200446,172,480
Size464.8 MB 425.5 MB
Events in quadrant A2,925,2942,530,668
Events in quadrant B2,893,7322,656,804
Events in quadrant C2,946,3522,553,186
Events in quadrant D2,567,2122,343,805

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01208180
B01090360
C01042160
D01094990

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010160
B010140
C010120
D010180

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0680
B0680
C0680
D0680

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A4988422804.570604%
B4995911242.249845%
C499639781.957449%
D499578581.717477%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 57627 50198 0 0 0.00% 0.00%
B 57627 50271 0 0 0.00% 0.00%
C 57627 50263 0 0 0.00% 0.00%
D 57627 50264 0 0 0.00% 0.00%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 0 29 2440 9.06 761 714 190.5
A 7 110 2397 8.84 761 714 190.5
A 9 19 2176 7.68 761 714 190.5
B 2 9 2405 11.03 763 728 152.0
B 2 8 1939 7.97 763 728 152.0
B 14 254 1895 7.68 763 728 152.0
C 12 241 2107 6.87 778 726 201.0
C 3 126 2027 6.47 778 726 201.0
C 9 242 1950 6.09 778 726 201.0
D 3 14 1930 6.53 732 666 193.5
D 10 190 1858 6.16 732 666 193.5
D 6 231 1807 5.9 732 666 193.5

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter